Phone Call Answering Services: How They Work and How to Choose One

A phone call answering service is a company or software that answers your business phone on your behalf. Instead of a caller reaching your voicemail, they reach a receptionist, either a person or an automated one, who greets them using your business name and details.

The service does not replace your phone number. You keep the number customers already know and forward calls to the service. That means callers dial the same number as always; they just reach someone who can help when you are busy or unavailable.

Answering services handle common call tasks: taking messages, answering basic questions about your business, and, if the service supports it, booking appointments. Anything the service cannot answer, like a price you have not provided or a question outside your saved details, gets turned into a message for you instead of a guess.

• You keep your existing business number; forwarding sends calls to the service
• Calls are answered with your saved business information
• Common outcomes: a message taken, a question answered, or an appointment booked
• You review calls, transcripts, summaries, and bookings in a dashboard

Setup starts with the service learning about your business. With AllDayDesk, for example, you choose your business or enter its website, check the details it pulled together, and hear a personalized sample of how your calls would be answered. The sample is a demonstration only; it does not create a real booking.

Next, you set up your phone. You keep your public number and forward calls to the service. The exact steps depend on your phone carrier, so check the instructions for your specific service before entering any codes.

After that, calls flow on their own. When a caller reaches the service, it answers using your business information, handles what it can, and takes a message when an answer, price, or appointment is unknown. Calls, transcripts, summaries, and bookings are visible in your dashboard.

For appointments, new bookings go to the built-in AllDayDesk dashboard calendar by default once you have configured your services and availability. If you prefer, you can optionally connect Google Calendar in Settings after connecting and authorizing your Google account. Changes to existing appointments are sent to you as requests, not confirmed changes, so you stay in control of your schedule.

• Enter your business or website, then check the details
• Hear a personalized sample before going live
• Forward your number using your carrier's own instructions
• Review calls, transcripts, summaries, and bookings in the dashboard

There are three broad categories, and they differ in who or what does the answering, when coverage is available, and how pricing usually works.

Human answering services staff your calls with trained people. Companies such as AnswerConnect offer around-the-clock live answering by people, and Ruby offers human virtual receptionists with plans advertised starting at $245 per month as of October 9, 2026. Smith.ai uses per-call pricing for its human receptionist service. With human services, costs depend on included minutes or calls, overage rates, hours, and contract terms, so always compare a current quote rather than a starting price alone.

Automated AI receptionists answer calls with software instead of people. Smith.ai, for example, offers a separate AI receptionist product alongside its human service. AllDayDesk, the service on this site, is an AI receptionist that answers around the clock using your saved business information, shows calls and bookings in a dashboard, and supports an optional Google Calendar connection in Settings.

Simple phone systems, like voicemail and auto attendants, are the third option. They play menus or greetings rather than holding a conversation, and they cannot answer questions or book appointments.

• Human services: people answer; pricing often per minute or per call
• AI receptionists: software answers around the clock; often flat monthly plans
• Voicemail and auto attendants: menus and greetings only, no conversation
• Compare included allowance, overage rates, and hours on a current quote

Forwarding is the step that connects your existing number to the answering service, and the instructions depend entirely on your phone provider. There is no universal code that works everywhere, and the same carrier can use different steps for different products.

A few verified examples show the range. Verizon mobile uses *72 plus the 10-digit destination for all-call forwarding, *71 for unanswered calls, and *73 to disable. T-Mobile uses **21*1 plus the destination and # for unconditional forwarding, with ##21# to disable. Comcast Business manages forwarding through My Account or the Comcast Business App, and Spectrum Business Voice uses the forwarding controls after signing in at SpectrumBusiness.net. AT&T Phone for Business uses *72, destination, # for all calls and *92 for no-answer forwarding.

One important limit: Google Voice explicitly does not support forwarding calls from a Google Voice number to an automated system, so a Google Voice number is not a compatible path to an AI answering service.

Before entering anything, identify the exact product name on your bill or account, then follow that product's own instructions. If your carrier is not listed here, contact its support to confirm whether forwarding to an outside number is supported on your plan.

• Verizon mobile: *72 + destination for all calls, *71 for unanswered, *73 to disable
• T-Mobile: **21*1 + destination + # for unconditional, ##21# to disable
• Comcast Business and Spectrum Business Voice: portal or app controls
• AT&T Phone for Business: *72, destination, # for all calls; *92 for no answer
• Google Voice numbers cannot be forwarded to an automated answering service

Start with coverage. Decide when you need calls answered: only when you are on another call, evenings, weekends, or around the clock. Around-the-clock availability describes when the service can answer, not a guarantee that every single call connects, so ask any provider how they handle busy periods.

Next, decide what each call should accomplish. If callers mostly need a message passed along, a basic service works. If they need to book appointments, choose a service that supports booking and make sure you can configure your services and availability first. If some calls need to reach you directly, ask how transfers work: with AllDayDesk, you configure a transfer destination and rules yourself, and neither pickup nor an immediate response is guaranteed on a transferred call.

Then compare pricing against your call volume. Human services commonly bill per minute or per call, and starting prices like Ruby's $245 per month do not show overage rates or contract terms. AI receptionists like AllDayDesk use flat monthly plans with an included minute allowance and a per-minute rate beyond it. Estimate your monthly call minutes and check which plan fits before committing.

Finally, test the practical details: can you keep your number, does your carrier support forwarding, and can you see transcripts and summaries so you know what happened on each call?

• Decide when you need coverage and what each call should accomplish
• Confirm booking support and configure services and availability first
• Match pricing to your estimated monthly call minutes
• Verify your carrier supports forwarding before signing up

Knowing the limits helps you set honest expectations with callers. An answering service works from the business information you provide. When a caller asks something the service cannot answer, such as a price you have not saved or a question outside your details, it takes a message instead of guessing.

Changes to existing appointments are passed to you as requests rather than confirmed changes, so you approve anything that touches your current schedule. Transfers only work if you have configured a destination and rules, and a transferred call is not guaranteed to be picked up or answered immediately.

Answering services also do not replace other office work. An in-house receptionist, according to the Bureau of Labor Statistics, greets visitors and handles office tasks beyond the phone, so compare scope rather than treating a phone service as a full employee replacement. And these services are not a fit for every phone setup: Google Voice numbers, for instance, cannot be forwarded to an automated system.

• Unknown answers, prices, or appointments become messages, not guesses
• Existing appointment changes are requests for you to approve
• Transfers require your configured destination and rules
• A phone service does not cover in-person reception or office tasks